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Northrop Grumman

Builds stealth bombers, missiles, and satellites

Principal / Senior Principal Cyber Systems Administrator

System Administration +1Updated on Nov 3
Full-timeHuntsville, AL, USA

About the Job

Requirements

  • A Principal Cyber Systems Administrator requires a bachelor's degree in Computer Science, Information Systems, Cyber Security, Engineering, or a related STEM discipline and at least 5 years of relevant experience, or a master's degree and at least 3 years of relevant experience.
  • A Senior Principal Cyber Systems Administrator requires a bachelor's degree in Computer Science, Information Systems, Cyber Security, Engineering, or a related STEM discipline and at least 5 years of relevant experience, or a master's degree and at least 6 years of relevant experience.
  • U.S. citizenship and an active DoD Secret clearance are required.
  • Extensive hands-on experience administering Linux and Windows servers and systems in production or mission-critical DoD or enterprise environments is required.
  • Strong experience with virtualization platforms such as VMware, KVM, or Hyper-V, and/or administering workloads in major cloud environments such as AWS or equivalent, is required.
  • Demonstrated experience configuring and supporting network services, including DHCP, DNS, routing, VPNs, and firewall rules, in multi-site architectures is required.
  • Proven experience implementing and managing PKI, TLS/mTLS, HTTPS, and certificate chains, including CA hierarchy and certificate lifecycle management, is required.
  • Experience with automation and configuration management tools such as Ansible, and Git for version control, branching, merging, and change review, is required.
  • Experience operating and tuning monitoring and logging solutions such as Prometheus, Grafana, ELK/Loki/Splunk, or similar observability stacks is required.
  • Working knowledge of NIST SP 800-53, RMF, and DoD Security Technical Implementation Guides (STIGs) as applied to systems and networks is required.
  • Experience leading or executing patching and vulnerability remediation activities such as IAVA/IAVM, and documenting results for compliance and accreditation, is required.
  • Experience supporting mission-critical or 24x7 systems and operating in connected, intermittent, and disconnected environments is required.

Responsibilities

  • Administer Linux and Windows servers and systems, and virtualized environments supporting STRAND and C-UAS NCS.
  • Design, configure, and maintain core network services, including DHCP, DNS, NTP, VPN, routing, and firewall policies across multiple sites.
  • Implement and sustain secure communications, including HTTPS, TLS/mTLS, PKI, and certificate-based authentication for users, services, and machine-to-machine traffic.
  • Lead automation and configuration management using Ansible and Git-based workflows, and drive adoption of intent-based configuration practices.
  • Engineer and maintain monitoring and observability solutions, including Prometheus, Grafana, log aggregation, and tracing, to provide real-time insight into system and network health.
  • Own system patching and hardening, including applying OS and application security updates, STIGs, and IAVA/IAVM remediation, with clear documentation.
  • Support secure data collection and transfer from V-BONE and other networked assets to Army-authorized cloud environments such as AWS, including S3 storage, checksums, and integrity validation.
  • Participate in and technically support integration events, lab testing, and field deployments, including Government test ranges and operational locations.
  • Develop and maintain runbooks, SOPs, configuration baselines, and troubleshooting guides, and provide Tier 3–4 and subject-matter-expert support for complex incidents.
  • Collaborate with cyber and systems engineering to support RMF/ATO and FedRAMP-aligned activities, including security documentation and continuous monitoring support.

Desired Qualifications

  • Prior experience with C-UAS, C-RAM, SHORAD, FS-LIDS, M-LIDS, BONES/B-NET, or similar sensor/effects networks in OCONUS or deployed settings.
  • Experience supporting OCONUS deployments, test ranges, or contingency operations.
  • Hands-on experience administering systems in AWS, with GovCloud as a plus, including Amazon S3 data storage and lifecycle management and AWS Lambda or similar serverless services for data ingestion and processing pipelines.
  • Experience with Kubernetes platforms such as RKE2 and service meshes such as Istio, including mTLS enforcement, traffic policies, and mesh observability such as Kiali.
  • Experience integrating SSO, MFA, and RBAC into enterprise or tactical environments, and familiarity with zero-trust-aligned segmentation and access control.
  • Experience with GitOps and CI/CD tools such as ArgoCD, Jenkins, or GitLab CI for automated deployment of infrastructure and applications.
  • Familiarity with OCI-compliant container registries and distributed management of container images across multiple sites.
  • Experience with intent-based network configuration, hierarchical Git repositories for configuration state, and Secure Zero Touch Provisioning (SZTP).
  • Depth in observability stacks, ideally including Prometheus or Mimir for metrics and Loki for logs.
  • Experience contributing to or maintaining FedRAMP-aligned and RMF/ATO environments, including security plans, boundary diagrams, data flow diagrams, and POA&Ms.
  • Strong written and verbal communication skills and proven ability to act as a technical lead and collaborate across systems engineering, cyber, software, and operations teams.

About the Company

Northrop Grumman

Builds stealth bombers, missiles, and satellites

Northrop Grumman builds military aircraft, missiles, rocket motors, satellites, and electronic systems, mostly for the American military and allied governments. It designed the B-2 stealth bomber and built NASA's James Webb Space Telescope, the largest telescope ever sent to space. The company works through four businesses: aircraft, missiles and ammunition, radar and communications systems, and space hardware such as satellites and solid rocket boosters. Most revenue comes from long-term government contracts, many of them classified. Its roots go back to Northrop Aircraft, founded in 1939, and it took its name after buying Grumman in 1994 and is based in Falls Church, Virginia.

Company size
10,001+
Company stage
IPO
Headquarters
Falls Church, VA
Founded
1939

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